X-ray transformer housing



Jan. 27, EY

X-RAY TRANSFORMER HOUSING Filed Feb. 27, 1939 In I/en tor: Caper-fanBHors/ey.

Patented Jan. 27, 1942 UNITED, STATES PATENT OFFICE X-RAY' TRANSFORMERHOUSING Cap'erton B. Horsley, Toronto, Ontarim Canada, assignor, bymesne assignments to Sutton- Horsley Company Limited, Toronto,-ntario,Canada, a corporation of Ontario Application February 27, 1939, SerialNo. 258,694

The principal objects of this invention are to provide an improved formof sealed housing for enclosing and firmly supporting the transformer,tube and other associated parts in an insulating body of oil and toachieve the maximum strength with the minimum weight and size.

A further object is to provide a casing for this purpose which will beeffectively sealed against oil leakage but capable of being readilyopened and re-sealed and which may be manufactured at low cost withoutexpensive die equipment.

The principal features of the invention reside in the novel constructionof the transformer housing from light metal sections which may beeconomically spun to shape and in the provision of clamping ring memberswhich co-operate to seal the meeting edges together and toeffectivelyreinforce the same.

A further and important feature resides in the novel manner ofincorporating a mounting member for the heavy transformer unit byforming or spinning the light metal of the housing thereabout inembracing and sealing relation to thereby effectively distribute theweight and strain of the transformer equipment about the light metalFigure is a fragmentary sectional elevation taken through the closuresealing means of one of the casing sections.

Figure 6 is a fragmentary sectional elevation illustrating amodification of the clamping means.

In the manufacture of portable X-ray equipment it is essential that theweight and bulk be maintained as low as possible, and since it isnecessary to house the heavy transformer unit in some form of oilcontainer, difiiculty has been experienced in providing an enclosingcasing which would be sufliciently light and small and yet provide afirm support for the said unit and which at the same time would be ofsuch construction as to guard against leakage of the oil and provide forready access to the interior.

The present invention has been devised to overcome these difficultiesand in the illustrated form thereof the transformer casing comprises anupper section I and lower section 2 each being preferably formed of thingauge aluminum or other metal and, shaped by spinning so that the sidewalls present the required contour, here shown of stepped formation. Thesection I is formed with a peripherally enlarged upper zone 3 whichtapers in to a reduced waist portion 4 which merges with a downwardlyextending skirt portion 5. A clamping ring Bencircles the skirt 5 andthe edge portion of the skirt is spun outwardly, to provide a clampingflange l.

The lower section 2 is here shown of smaller size than the skirt portion5 but with a side wall '8 which flares outwardly to terminate in anoutward flange 9. A transformer mounting ring I0 is placed on the flange9 and the casing wall is spun thereabout to tightly embrace the ring IIIat the edge and outer side as indicated at H and I2 and the terminaledge is shaped into a cylindrical extension l3 which fits snugly withinthe skirt 5 of the section I, a sealing gasket It being placed betweenthe flange portions I2 and I of the respective sections in encirclingrelation to the extension l3.

A clamping ring member I5 is flanged to embrace the out-turned flange 9and clamping screws l6 extend through the clamping ring 6 and arethreaded into the ring l5 to firmly draw the respective rings togetherinto firm limiting contact while effecting the compression of thesealing gasket.

The casing sections are thus not only firmly clamped together in aneffectively sealed manner but the clamping pressure set up will serve tofirmly clamp the inserted mounting ring between the flanges 9 and 12.

In the modified form of clamping means shown in Figure 6 the ring memberI5 is externally threaded while the ring 6 is internally threaded toeffect the clamping by relative rotation of the rings.

Lugs l0 project inwardly from the ring I0 and are so positioned that theheavy transformer unit I! rests thereon and is secured thereto by thebolts I8 with the transformer windings illustrated in dotted lines l9,nicely clearing the walls 5 and 8.

An expansion bellows 20 is accommodated in the section 2 and one or morefilament transformers 2| are mounted on the main trans- 22 areaccommodated in the peripherally enlarged upper section I.

A central opening 28 is shown in the end of the casing section I ,and aclamping ring 24 encircles the same and the thin casing metal about theopening is spun back over the reduced flange portion 24'. A cuppedclosure member 2| is then placed in position with its flange 25'overlying a sealing gasket 20 and clamping pressure is then applied bymeans of a clamping ring 21 and screws 28, the cupped closure 25 beingof a suitable material which will not deleteriously impede passage 01the X-rays irom the tube 22.

The clamping ring 24 may advantageously serve as a mounting means forthe shield or cone member 1! which may be detachably clamped by threadedmeans 30 entering a notch or recess ll in the ring 24. a It will bereadily appreciated that with a construction such as defined a flrm andadquate support will be provided (or the transformer equipment eventhough the casing itself is of very light construction and the contourof the respective sections may be readily obtained by a simple spinningoperation to closely conform to the units to be housed therein so thatthe size and weight will be reduced to the minimum and also the oilrequirements, resulting in a strong and compact assembly.

What I claim as my invention is:

1. In a transformer housing, a casing formed of separable sections, oneof said sections being flanged outwardly and having a transformermounting ring overlapping the flange, the edge portion of said sectionbeing flanged to embrace the edge and opposite iace oi the ring and theother casing section having an out-turned flange, a sealing gasketinterposed between the flanged portions of the respective casingsections, an annular clamping member engaging the firstmentioned flangedportion of the first section, and clamping means engaging the flange oithe second-mentioned section and co-operating with the annular clampingmember to compress said sealing gasket and constrict the flangedportions of the first-mentioned casing about the clamping ring.

2. Apparatus as claimed in claim 1 in which the first-mentioned casingsection is provided with a cylindrical extension adapted to present asealing contact with the inner periphery of the sealing gasket and toextend into the other casing section.

3. Means as claimed in claim 1 in which said clamping means includes aclamping ring and said annular clamping member is of angular crosssection to present a peripheral wall portion adapted to embrace thesealing gasket on the outer periphery and to engage the clamping ring inlimiting contact.

CAPERTON B HORSLEY.

